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(2/3)*x-((7/12)*x) = 5 // - 5
(2/3)*x-((7/12)*x)-5 = 0
(2/3)*x+(-7/12)*x-5 = 0
1/12*x-5 = 0 // + 5
1/12*x = 5 // : 1/12
x = 5/1/12
x = 60
x = 60
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